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Note 17 - Concentration of Credit Risk | 12 Months Ended
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Apr. 30, 2021
Notes to Financial Statements |
Concentration of Credit Risk [Text Block] | Note 17 - Concentration of Credit Risk: Financial instruments that potentially subject the Company to concentration of credit risk consist principally of cash deposits. Accounts at each institution are insured by the Federal Deposit Insurance Corporation (“FDIC”) up to $250,000. At April 30, 2021 and 2020, the Company had $2,742,000 and $5,202,000, respectively, in excess of the FDIC insured limit. Management has concluded the excess does not represent a material risk, based on the creditworthiness of the counter parties.

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